326611820 has 48 divisors (see below), whose sum is σ = 731874528. Its totient is φ = 122004480.

The previous prime is 326611819. The next prime is 326611823. The reversal of 326611820 is 28116623.

It is not an unprimeable number, because it can be changed into a prime (326611823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40874 + ... + 48206.

It is an arithmetic number, because the mean of its divisors is an integer number (15247386).

Almost surely, 2^326611820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 326611820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365937264).

326611820 is an abundant number, since it is smaller than the sum of its proper divisors (405262708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

326611820 is a wasteful number, since it uses less digits than its factorization.

326611820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7490 (or 7488 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 326611820 is about 18072.4049312757. The cubic root of 326611820 is about 688.6691564010.

The spelling of 326611820 in words is "three hundred twenty-six million, six hundred eleven thousand, eight hundred twenty".